I wanted to know a little bit about the timestamp provided by the shield. If there is no GPS signal, does the timestamp get updated by some sort of IC? Will the time update regardless of wether the position had ever been recieved? (assumming there was an initial connection to sync the clock at some point in its life)
Also, what is the purpose of the battery? I read in the documentation that it stores the almanac in SPRAM. Is it also used for some sort of IC?